8.51 Consider a thin-walled, metallic tube of length L 1 m and inside diameterD 3 mm. Water enters the tube at m 0.015 kg /sm-0.015 kg/s and Tm.i=97°C.a. What is the outlet temperature of the water if the tube surface temperature ismaintained at 27 C? (b. If a 0.5-mm-thick layer of insulation of k = 0.05 W/m-K is applied to the tube andits outer surface is maintained at 27°C, what is the outlet temperature of the water?c. If the outer surface of the insulation is no longer maintained at 27°C but is allowedto exchange heat by free convection with ambient air at 27°C, what is the outlettemperature of the water? The free convection heat transfer coefficient is5 W/m-K

Answered: Image /qna-images/answer/da150fcb-cf73-4cd6-819a-20c7898af545.jpg

8.51 Consider a thin-walled, metallic tube of length L =1 m and inside diameter Di 3 mm. Water enters the tube at m 0.015 kg/sm-0.015 kg/s and Tm,i 97°C. a. What is the outlet temperature of the water if the tube surface temperature is maintained at 27°C? ( b. If a 0.5-mm-thick layer of insulation of k 0.05 W/m-K is applied to the tube and %3D its outer surface is maintained at 27°C, what is the outlet temperature of the water? If the outer surface of the insulation is no longer maintained at 27°C but is allowed c. to exchange heat by free convection with ambient air at 27°C, what is the outlet temperature of the water? The free convection heat transfer coefficient is 5 W/m2-K.

8.51 Consider a thin-walled, metallic tube of length L =1 m and inside diameter Di 3 mm. Water enters the tube at m 0.015 kg/sm-0.015 kg/s and Tm,i 97°C. a. What is the outlet temperature of the water if the tube surface temperature is maintained at 27°C? ( b. If a 0.5-mm-thick layer of insulation of k 0.05 W/m-K is applied to the tube and %3D its outer surface is maintained at 27°C, what is the outlet temperature of the water? If the outer surface of the insulation is no longer maintained at 27°C but is allowed c. to exchange heat by free convection with ambient air at 27°C, what is the outlet temperature of the water? The free convection heat transfer coefficient is 5 W/m2-K.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: Determine the thermal entry lengths for laminar flow at 60 ◦ C and at a rate of 0.015 kg/s ofwater,…

A: Given Data Mass flow rate of water is : m˙=0.015 kg/s Temperature is : T=60°C Inside diameter is :…

Q: A thin-walled circular tube of 60 mm inner diameter and 9 m length maintains a uniform surface…

Q: A gas is cooled by circulating it in a turbulent regime through the interior of a circular duct with…

A: Given: The diameter of duct, Di = 0.025 m The internal wall temperature, Ti = 310 K The average…

Q: Water at 15°C (p = 999.1 kg/m3, cp 4.18 kJ/kg.K and u = 1.138E-3 kg/m. , k = 0.631 W/m.°C) is…

A: Solution:Given dataT1 = 15°cρ = 999.1 kg/m3cp = 4.18 kJ/kgkμ = 1.138×10-3 kg/msk =0.631 w/mCd =4.3…

Q: a) What is the required tube length for these conditions? b) To design a water heating system,…

A: first we calculate reynolds numebr then evaluate nusselt number then figure out h and the use…

Q: Consider a thin-walled tube of 10 mm diameter and 2 m length. Water enters the tube from a large…

A: To Find : The outlet temperature of the water. Given : The diameter and lenght of thin tube are d=10…

Q: Q) Water at 22'C flows in a 40-cm-diameter pipe and 25-m-long at an average velocity of 0.15 m/s.…

Q: air at constant pressure of 101.3kpa and 289 k enters inside a tube having an inside diameter of…

A: Pressure = 101.3 kPa Internal temperature = 289 K Diameter = 19.1 mm length = 2.12 m Velocity = 24.4…

Q: Write your answer in 4 decimal places. DO NOT round off intermediate values. Water at a mean…

A: As per given question Temperature =25°c Re=10000 We have determine Nu and heat convetion cofficien

Q: 1. The mean Nusselt number for fully developed laminar flow in a circular tube under constant heat…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and length L = 25 m…

Q: Air at p = 1 atm enters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet…

Q: Hot fluid "C= 2562 J/kg.k, Pr 51.3, u = 5.22E-3 Pa.s, k 0.260 W/m.K" flows at 0.9 kg/min inside a…

A: As given data as Cp=2562 J/kg.KPr =51.3μ=5.22×10-3 Pa.sk=0.260 W/m.Km˙=0.9 kg/min=0.015 kg/sInner…

Q: Air at p = 1 atm enters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet…

Q: A hot fluid passes through a thin-walled tube of 10-mm diameter and 1-m length, and a coolant at T =…

A: Given data: T∞=25°Cm˙=18 kg/hTm,i=90°CTm,o=78°Cd=10 mm=0.01 mL=1 m Need to determine the outlet…

Q: A tube bank uses a staggered arrangement of D=0.9 cm diameter tubes with S7=2 cm and SL=1.7 cm.…

Q: Heat transfer problem Water flows through a thin-walled cylindrical tube of diameter 1 cm,…

Q: Choose the right answer 1. The mean Nusselt number for fully developed laminar flow in a circular…

Q: Consider pressurized water, engine oil (unused), and Nak (22%/78%) flowing in a 20-mm-diameter tube.…

A: To Find: The mean velocity the hydrodynamic entry length at temperature T=366 K. Given : The fluid…

Q: Air (at T = 300 K) flows at 1m/s normal to a 77 C, 30mm-diameter pipe and 250mm long. The following…

Q: Dry and saturated steam at 6 MPa abs. enters a 40m length of 11.5 cm O.D steel pipe at a flow rate…

A: Given, Steam Pressure P1=6MPa Steam Temperature T1=275.586°C (from steam table) Length of the tube…

Q: What is the ratio of total convective heat transfer rate to laminar convective heat transfer rate…

A: Given that,Kinematic viscosity, Length of plate, L=2mVelocity, V=10m/sWe have to find the ratio of…

Q: A liquid is entering a 10 m long pipe of 0.2 m diameter at 25°C with an average velocity of 0.02…

Q: Engine oil flows through a 25-mm-diameter tube at a rate of 0.5 kg/s. The oil enters the tube at a…

Q: Q) Water at 12°C flows in a 2.5-cm-diameter pipe and 10-m-long at an average velocity of 0.1 m/s.…

A: Given: The temperature of water, T = 12°C The diameter of pipe, d = 40 cm = 0.025 m The length of…

Q: Heat transfer problem Water flows through a thin-walled cylindrical tube of diameter 1 cm,…

Q: A flat plate 1.5 m wide and 2.0 m long whose surface is kept at 150 oC will be cooled by a current…

A: Laminar flow: Laminar flow is a type of fluid (gas or liquid) movement in which the fluid moves…

Q: Air at p = 1 atmenters a thin-walled (D = 5-mm diameter) long tube (L = 2 m) at an inlet temperature…

Q: 3 Water at 15°C (p = 999.1 kg/m , cp = 4.18 kJ/kg.K and u = 1.138E-3 kg/m.s k = 0.631 W/m.°C) is…

Q: an oil at average temperature of 100 F flows at 1.2 ft/s velocity 0.834in inside diameter horizontal…

A: Given data average temperature of oil, Toil=100 F (310.9K) V=1.2 ft/s D=0.834 in average surface…

Q: Air is to be heated from 15 C to 270 C, as it flows through a tube 25mm diameter at average velocity…

Q: An L = 1-m-long vertical copper tube of inner diameter D, = 20 mm and wall thickness t = 2 mm…

A: Given-Information:- L = 1 m Di = 21 mm = 0.021 mt = 2 mm = 0.002 mTw = 0°C = 273 K V = 3m/sT∞ =…

Q: Consider pressurized water, engine oil (unused), and Nak (22%/78%) flowing in a 20-mm-diameter tube.…

Q: Water (5.0 L/min) is flowing in a tube “D = 3 cm, L= 5 m" and is to be heated from 15°C to 60.3°C by…

Question

8.51 Consider a thin-walled, metallic tube of length L 1 m and inside diameter
D 3 mm. Water enters the tube at m 0.015 kg /sm-0.015 kg/s and Tm.i=97°C.
a. What is the outlet temperature of the water if the tube surface temperature is
maintained at 27 C? (
b. If a 0.5-mm-thick layer of insulation of k = 0.05 W/m-K is applied to the tube and
its outer surface is maintained at 27°C, what is the outlet temperature of the water?
c. If the outer surface of the insulation is no longer maintained at 27°C but is allowed
to exchange heat by free convection with ambient air at 27°C, what is the outlet
temperature of the water? The free convection heat transfer coefficient is
5 W/m-K

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Trending now

This is a popular solution!

Step by step

Solved in 5 steps with 5 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Include fbd and assumptions
Please don't provide handwritten solution .....
Water is to be heated from 35 °C to 65 °C in a rough tube with a relative roughness of 0.001. The tube has an electric heater provides a constant heat flux such that the tube average wall temperature is 20 °C above the average water bulk temperature. The Reynolds number used for calculating the heat-transfer coefficient is 100,000. Calculate the length of tube required for heating, expressed in meters, if the tube has a diameter of 1 cm.
This is a complete question I am stuck in. Kindly answer as soon as possible.
Choose the right answer 1. The mean Nusselt number for fully developed laminar flow in a circular tube under a constant heat flux a. depends on Reynolds number b. depends on Prandtl number c. is constant 2. The value of Prandtl number for air is about а. О.1 b. 0.3 с. 0.7 3. In natural convection heat transfer, the Nusselt number is a function of a. Re and Pr b. Re and Gr c. Grand Pr 4. A fluid is flowing along a plate having a high uniform wall temperature. The heat transfer along the length a. decreases b. remain constant c. increases 5. For fully developed laminar flow and heat transfer in a heated long circular tube, if the flow velocity is doubled and the tube diameter is halved, the heat transfer coefficient will be a. four times of the original value before b. half of the original value с. same as d. double of the original value
SAE 50 oil flows at 3 m/s between 0.25 m-long parallel plates spaced 3 mm apart. If the plates are at 400 K and the average of the inlet and outlet bulk temperatures is 360K. Determine the average heat transfer coefficient.
A thick concrete wall having a uniform temperature of 50oC is suddenly subjected to a stream of water so that the surface temperature is suddenly lowered to 15oC. How long will it take to cool the concrete to 30oC at a depth of 5 cm from the surface? Data: concrete properties, k = 1.37 W/m×oC, r = 2100 kg/m3, a = 7.5×10-7 m2/s.
Write your answer in 4 decimal places. DO NOT round off intermediate values. Water at a mean temperature of 25°C flows across a 1-cm square tube in cross-flow with a Reynolds number of 10,000. Calculate (a) Nu and (b) the convection heat transfer coefficient. Answers: a. Nu = b. h = W/m2-K
Harry up plz
Water at 15°C (p = 999.1 kg/m3, cp = 4.18 kJ/kg.K and u = 1.138E-3 kg/m.s k = 0.631 W/m.°C) is flowing steadily in a 4.3-cm-diameter, 9.9- m-length horizontal pipe made of stainless steel at a rate of 1.9 kg/min, the outer surface is subjected, to a uniform heat flux of 6.2 kW/m". Assume fully developed flow. What is the pressure drop in the pipe "in Pascals"? Select one: А. 4.98 B. 5.62 С. 4.26 D. 3.53 O E. 6.26
Heat Transfer Questiion is image
Water flows through a tube of 5mm inside diameter with a volumetric flow rate of 7.8 cm3/s. Wall temperature of the tube is kept constant at 80oC. In a fully developed velocity and temperature profile region of 5m length, calculate the bulk temperature of exiting water if its inlet temperature is 20oC